hello folks

i  want to start a web site that sells digital goods and the payment for the store would be 2 or 3 alt coins .

what i need is a shopping cart that calculate the price of an alt coin and dynamically  change the product price at the checkout stage for the current alt coin value / btc  .

the site does not need to be fancy a simple website with 1 horizontal line with the items is good enough as long it can be customized with adding new items or adding new alt coin support , if can such system can be implemented in an existence shopping cart system  is a huge plus like (opencart - magento - Drupal - zencart ) or even a wordpress template .   


please reply here or PM for more information